Container



Feb. 8, 1949.- Q ALL m; 2,461,251'- CONTAINER a Sheets-Sheet 1 Filed March 12, 1945 Qwucmkou, 60.51am ED. 5:077

Feb. 8, 1 949. c, 0, BALL ETAL 2,461,251

CONTAINER Filed March 12, 1945' 3' Sheets-Sheet g I71). Scorr Jyvucniou.

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Feb. 8, 1949. c. 0. BALL ETAL CONTAINER :5 Sheets-Sheet 5 Filed March 12, 1945 l I I gswcmou 00.31am I:

Patented-Feb. 8, i949 g-um'rao STATES" PATENT Tome Oharles 0. Ball. Maurnee, v

Toledo, Ohio, aaaignorl to Owens-Illinois Glass company, a corporation of Ohio Application March 12, 1945, sea: No. 582,250

4 Claims. (01. ago-41) Our invention relates to containers made of sheet material such as paper or cardboard, the containers being formed from blanks material provided with creases or score lines at which the blanks are folded to shape the containers. The invention provides containers suitable for holding milk and other liquids.

The bottom of a paper co' tainer, for liquids such as milk, of ordinary folding flap constructlon or of any other construction in which a joint occurs in the exact corner, is unreliable and prone to leakage because such a corner joint is easily injured, during ordinary or normal use of the container, in a manner to cause leakage.

An object of the present invention is to overcome this weakness by providing a novel and practical construction in which the formation of joints at the bottom corners thereof is avoided and in which such corners are reinforced and protected in' a manner to give greater strength and resistance to leakage than in structures having joints or flaps at the corners thereof.

Other objects of the invention will appear hereinafter.

Referring to the accompanying drawings:

Fig. 1 is a plan view of a blank with score lines or creases adapting it to be folded to form a gmtainer in accordance with the present inven- Fig. 2 is a bottom end view of the container on a somewhat larger scale and with a portion of the outer end flap broken away.

Fig. 3 is a perspective view of the container in inverted position, the end portion of the blank forming the bottom'of the container being only partly folded.

Figs. 4, 5, and 6 illustrate a modification and correspond respectively to Figs. 1, 2; and 3.

Figs. 7, 8, and 9 are views similar to Figs. 1, 2, and 3 respectively, and show a further modification.

Referring to Fig. 1, which shows the blank of sheet material from which the container is formed, the blank is provided with vertical and Franklin oott,

crease 23 which defines the upper margin of of the sheet strips or flaps 2t the tubular bo y.

The body. portion of the blank includes side and 25 at opposite ends thereof adapted to be folded along the creases I4 and I'D respectively for forming a body seam. The flap 24 is in the form-of a triangle A, B, F, the upper side F, A of the triangle being an extension of the line 23, and the outer edge of the flap being inclined tov the'crease it and meeting the latter at the point B. Below the point B, the

a outer edgeof the blank extends vertically downward in line with the crease It to the point C at the endof a horizontal score line 23" which defines the bottom margin of the container.

The flap 25 at the opposite side of the blank includes a vertical portion in the form of a triangle G, 11,0, similar but having the short side of the triangle coinv ciding with the end portion of the score line 23' and the inner edge of the strip formed by the score'line it. when the blank is folded to shape the tubular body of the container, the flap 24 is folded over on the outer surface of the side It and the flap 2! is folded inwardly and lies against the inner face of the .side l8, the flaps being glued or adhered to the sides of the container to form a liquid-tight seal. It will be 0f the side panels II, 18, I1 and it are creases or score lines l0, ll, l2, l3, and it at which the blank is folded to form a tubular body,

rectangular in cross section and having vertical,

rectangular sides l5, l8, l1 and la. The term score line is used herein to designate any crease or weakened lin'e adapting thesheet material to be folded or bent along such line. The upper end of the container comprises a series of flaps ll, 20, 2| and" integral with the body portion of the container and folded inwardly along a seen that with this construction, the flaps 2t and 25 overlap and form a double wall'thickness along that portion of the vertical edge of the container between the points B and G.

The bottom end of the container is formed from that portion of the blank below the horizontal score line 23*, said portion comprising a continuous unbroken strip extending the full width of the 'blank. .The score lines Ill, ll, l2, and ii are extended to the lower edge of the blank and provide the corner creases along which the end portion is folded inwardly after the body of the container has been formed as shown in Fig. 3. -'1hese bottom end extensions designated respectively it", l6, l1, and it. Each of the sections it and i1 is provided with a pair of diagonal creases 26 along which the sec tion is folded concurrently'with the folding inwardly of the section as a whole. The section I5 is of greater width than the section l8 and covers the end sections l5, l1 and W in the folded bottom end.

The side seam strip 25 is extended downward ly beyond the margin line 25 and this extension 25' folds inwardly to overlie the section It. One corner of the section it (Fig. 1) is cutaway in shape to the flap 24,

. It also'cuts oil is a straight diagonal line extending between the points A and M. This line is at a greater angle to the vertical than the corresponding line A, B, in g. 1, and thereby forms a comparatively short folding strip 24. a section of the side panel l8.

Below the line 23, the edge is extended verat the bottom edge of the section I 8'.

The left-hand end,of the blank below the score line 23 is outlined by a diagonal line extending from the point F downward and outward to the point P at the end of the score line 23, and thence vertically downward to a point Q at the lower left-hand corner of the blank. The diagonal line F, P is at a, wider angle with the vertical than the corresponding line in Fig. 1, thereby providing a comparatively wide side seam strip. These diagonal lines at opposite ends of the blank are panel l8 with the triangular section 24 folded over the vertical side I! and with the strip 25. forming a corner portion of the vertical side I 8 of the container. The lower right-hand corner of the blank is cut away along the line N, so that in the folded container bottom it will not overlap the double thickness of the material formed by the folded end section IS.

The construction shown in Figs. 7, 8, and 9 form shown in Figs. 1 to 3.

Modifications may be resorted to within the spirit and scope of our invention. For example, in Figs. 1 and 3, instead of flap 24 being folded over the outer surface of the side l5 and the flap 2 lying against the inner face of the side l8. may be folded inwardly to lie against and the flap 25 may surface of the side I8.

tion of the blank,

a transverse score line in '4 and a transverse score line in position to define the lower edge of the said vertical score line at a point upper end of said body.

sheet material adapted to be spaced below the four sides of said body, along is adapted to be folded for forming said body, and

of the container, the blank including a side seam flap at one end thereof, one of said vertical score lines forming the inner edge of said flap, said flap being continued downward below said horizontal score line and through said bottom strip, whereby when the blank is folded to shape the container, the side seam is carried into a bottom tion of the container, said side seam flap having its outer edge extending diagonally upward and inward from said bottom margin score line and a point adjacent the upper end of the body porthe lower end of said second flap being spaced below the upper end of the .first mentioned flap.

3. A blank of sheet material of a shape to be 7 folded for forming a container having a rectanto the lower transverse gular tubular body and a flat closed bottom end, said blank having vertical score lines spaced to define the four sides of said body and along which the blank is adapted to be folded for forming said body, said blank having upper and lower transverse score lines extending along the inner edges of top and bottom strips and along which the upper and lower portions respectively of the,

blank are foldable for forming the upper and lower ends of the container, said blank having a side seam flap at one end thereof, said flap having an outer diagonal edge extending diagonally downward and outward from the upper score line, the flap being extended downward through said bottom strip, the. blank having a second diagonal edge at the opposite end of the blank from said strip, said second diagonal edge being extended diagonally downward and inward from the upper to the lower said transverse score line, substantially parailel with said first mentioned diagonal edge, said second diagonal edge being positioned to meet a said vertical score line at an intermediate point between said transverse score lines, whereby a tapered side seam flap is formed above said intermediate point. a

4. A container comprising a rectangular, tubular body and a closed bottom end, said container being formed of a single piece blank of flexible sheet material, said blank being folded along vertical score lines forming the vertical edges of said body, and a horizontal bottom score line forming the bottom edges of said body, said container having a side seam extending vertically along one vertical edge of the body and comprising inwardly folded integral flaps, said flaps being of tapered form, one said flap being tapered downwardly and inwardly from the upper edge of the body, the other flap being tapered upwardly and inwardly from the lower edge of the body, said flaps having overlapping portions in-- termediate the upper and lower edges of said body.

CHARLES 0. BALL. FRANKLIN D. SCOTT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

